Comprehensive recycling system for flue gas waste heat of copper smelting anode furnace

Abstract

The invention relates to a comprehensive flue gas waste heat recycling system for a copper smelting anode furnace. The comprehensive flue gas waste heat recycling system comprises a waste heat collecting flue, a heat conduction oil waste heat recycling system, a lithium bromide refrigerating unit, a heat exchange assembly, a gas mixing cylinder, a heat preservation ash bin and the like. A heat exchange assembly is arranged in the waste heat collection flue; the conduction oil waste heat recovery system is provided with a conduction oil station, a circulating oil pump, a pipeline and the like; the lithium bromide refrigerating unit is complete equipment, a heat source inlet end is connected with an outlet of the heat exchange assembly, and the outlet is connected with the heat-conducting oil station through a pipeline; a heat-insulating ash bin is arranged at the bottom of the bag-type dust collector and is connected with the heat-conducting oil circulating pipeline; the heat exchange assembly is connected with the heat conduction oil waste heat recovery system through a header, a pipeline and a valve to form a circulation system. Anode furnace smelting flue gas waste heat is used as a heat source of a lithium bromide refrigerating unit, and cold water at the temperature of 5-15 DEG C is prepared and used by an air conditioning system in a factory area. Compared with a traditional air conditioner, power consumption is reduced. The system realizes efficient recovery and deep utilization of flue gas waste heat of the rotary anode furnace.

Description

Technical Field

[0001] The present application relates to the technical field of waste heat recovery, and in particular to a comprehensive recovery and utilization system for waste heat from flue gas in anode furnaces of copper smelting. Background Art

[0002] The copper smelting production system of the nonferrous industry usually consists of three processes: smelting, blowing and refining. The smelting furnaces of each process are designed and equipped with independent flue gas treatment systems and waste heat recovery devices. Among them, the anode furnace is a smelting furnace configured for the refining process, and the waste heat recovery device is a waste heat boiler with "steam water" as the medium, which mainly uses the heat in the flue gas to heat the boiler water to produce low-pressure saturated steam to achieve the recovery of waste heat.

[0003] With the continuous improvement and updating of copper smelting and equipment technology, such as the promotion and application of diluted oxygen and natural gas in copper refining process, the flue gas output during the refining anode furnace smelting process is greatly reduced compared with the traditional compressed air and pulverized coal combustion process. 3 , H 2 O, smoke composition, dew point temperature and other parameters change accordingly. Due to the significant change in flue gas parameters, the traditional waste heat recovery device is no longer suitable for the production process of copper refining rotary anode furnace. This is reflected in the following aspects:

[0004] 1. The copper refining process consists of two or more rotary anode furnaces operating alternately according to the operating cycle, which can be divided into four stages in sequence: charging and melting period, oxidation period, reduction period and casting period. After the widespread use of diluted oxygen and natural gas in the copper refining process, the flue gas volume and total heat of the flue gas have been greatly reduced. In addition, the flue gas conditions at each stage of the rotary anode furnace are complex, dynamic and volatile. This makes it more difficult to control the drum liquid level, operating pressure and steam production stability of the waste heat boiler using the "steam-water system", which has a serious impact on the safe and stable operation of the waste heat boiler system.

[0005] 2. The volatility of flue gas conditions makes it difficult to automatically control, stably operate, and steadily transport steam from the waste heat boiler, making it impossible to achieve stable and qualified steam supply; there are bottleneck problems such as "shallow" recovery and inefficient utilization.

[0006] 3. During the alternation of the rotary anode furnace cycles, the flue gas parameters fluctuate greatly, resulting in large differences in the operating status of the waste heat boiler steam-water system (pressure, temperature, steam-water separation). During the process, the waste heat boiler frequently increases and decreases pressure due to the fluctuation of the flue gas heat load. Long-term operation is prone to equipment failures such as stress cracking of the waste heat boiler steam-water pipeline, fatigue damage of pressure-bearing components, and severe water hammer rupture of the steam pipeline, which seriously endangers the safe operation and service life of the waste heat boiler equipment.

[0007] 4. The operation stability of the waste heat boiler affects the boiler outlet flue gas temperature index. During the refining oxidation period of the anode furnace, the boiler outlet flue gas temperature reaches the maximum value. If the waste heat boiler is in poor operation and the outlet flue gas temperature is higher than 200°C for a long time, it is easy to cause the back-end bag filter to overheat and burn the bag equipment failure; during the reduction period, if the outlet temperature of the waste heat boiler is lower than 140°C, the smoke is easily affected by moisture, causing abnormal problems such as low-temperature corrosion of the ash bin at the bottom of the bag filter and bag adhesion.

[0008] 5. Low-temperature corrosion of the heating surface after the waste heat boiler is shut down. After the waste heat boiler is shut down, the temperature in the flue gas duct drops significantly. Affected by the characteristics of the anode furnace dust, when the metal wall temperature of the heating surface of the waste heat boiler is lower than the acid dew point, the anode furnace dust mixes with the acid liquid and adheres to the metal surface, causing low-temperature corrosion and thinning of the heating surface of the waste heat boiler, which greatly reduces the service life of the equipment and increases the production and operation costs of the enterprise. Summary of the invention

[0009] In order to solve or partially solve the problems existing in the related technology, the present application provides a comprehensive recovery and utilization system of flue gas waste heat from a copper smelting anode furnace, aiming to solve the technical problem that using flue gas waste heat to heat the waste heat boiler easily leads to unstable operation of the boiler system and low waste heat utilization efficiency.

[0010] The present application provides a copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system, including a waste heat collection flue 1, a heat transfer oil waste heat recovery system 2, a lithium bromide refrigeration unit 3, a heat exchange component 4, a bag filter 5, and a gas mixing cylinder 6;

[0011] The thermal oil waste heat recovery system 2 includes a thermal oil station 21 and a thermal oil pump 22;

[0012] The bottom of the bag filter 5 is provided with an insulation ash bin 51, and an insulation jacket 52 is welded on the outer side of the steel ash bin of the insulation ash bin 51;

[0013] One end of the flue gas side of the waste heat collection flue 1 is connected to the flue gas outlet exhaust pipe of the copper smelting anode furnace, and the other end is connected to the bag filter 5 through the gas mixing cylinder 6;

[0014] The waste heat collection flue 1 is provided with a heat exchange component 4; the lithium bromide refrigeration unit 3 includes a generator, a condenser, an evaporator, an absorber and a solution heat exchanger;

[0015] The heat exchange assembly 4 is equipped with an inlet header and an outlet header, the inlet header is connected to the oil inlet pipe of the heat transfer oil waste heat recovery system 2, and the outlet header is connected to the oil return pipe of the heat transfer oil waste heat recovery system 2;

[0016] Specifically, the thermal oil station 21 is connected to the inlet header of the heat exchange component 4 through a thermal oil pump 22 and a pipeline; the outlet header is connected to the thermal oil station 21 and the lithium bromide refrigeration unit 3 through an oil return pipeline;

[0017] The oil inlet end of the lithium bromide refrigeration unit 3 is connected to the oil return pipe of the thermal oil waste heat recovery system 2, and the oil outlet end is connected to the thermal oil station 21 through the oil return pipe; in addition, a bypass pipe is arranged on the oil return pipe, and the bypass pipe is connected to the oil inlet of the insulation jacket 52 of the insulation ash bin 51 at the bottom of the bag filter 5, and the oil outlet of the insulation jacket 52 is connected to the thermal oil station 21 through a pipe.

[0018] In some embodiments, the heat exchange assembly 4 includes a convection tube bundle 41 and a heat exchange baffle 42 of a membrane wall structure;

[0019] The waste heat collection flue 1 is divided into a gravity settling chamber 11 and a convection chamber 12 in sequence along the flue gas flow direction;

[0020] There are three groups of heat exchange baffles 42, which are respectively arranged at the bottom of the ash bin of the gravity settling chamber 11, the rear wall of the gravity settling chamber 11 and the top of the convection chamber 12, and divide the internal cavity of the gravity settling chamber 11 into a "π"-shaped flue gas channel;

[0021] Four groups of convection tube bundles 41 are arranged in the convection chamber 12 at intervals along the flue gas flow direction.

[0022] In some embodiments, a conical first ash discharge port 13 is provided at the bottom of the gravity settling chamber 11 , and two first ash discharge ports 13 are provided, each of which is located below the end of the flue gas channel.

[0023] In some embodiments, a first baffle 14 is disposed on the top surface of the convection chamber 12, and a second baffle 15 is disposed on the bottom surface of the convection chamber 12. The first baffle 14 and the second baffle 15 are alternately disposed along the flue gas flow direction, thereby dividing the internal cavity of the convection chamber 12 into a serpentine flue gas flow channel.

[0024] Two adjacent convection tube bundles 41 are separated by the first partition plate 14 or the second partition plate 15 .

[0025] In some solutions, the waste heat collection flue 1 is provided with a soot blowing device 7 arranged in a one-to-one correspondence with the convection tube bundle 41;

[0026] A conical second ash discharge port 16 is provided at the bottom of the convection chamber 12 .

[0027] In some solutions, the gas mixing cylinder 6 is provided with an air distribution pipe, and the air distribution pipe is provided with a valve 61.

[0028] The technical solution provided by this application may have the following beneficial effects:

[0029] This application uses the waste heat of anode furnace smelting flue gas as the heat source of lithium bromide refrigeration unit, and uses the working principle of lithium bromide refrigeration unit absorption refrigeration technology to produce (5-15)℃ cold water for factory air conditioning or compression fan intake cooling, which reduces power consumption compared with traditional air conditioning. The system realizes efficient recovery and deep utilization of rotary anode furnace flue gas waste heat, reduces energy consumption, is more energy-saving, environmentally friendly, and low-carbon, and has the advantages of efficient refrigeration, stability and reliability, low noise, and easy maintenance.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0032] Figure 1 It is a schematic diagram of the pipeline connection of the waste heat comprehensive recovery and utilization system shown in the embodiment of the present application;

[0033] Figure 2 It is a structural schematic diagram of a waste heat collection flue of a waste heat comprehensive recovery and utilization system shown in an embodiment of the present application;

[0034] Figure 3 It is a schematic diagram of the installation of a convection tube bundle of a waste heat comprehensive recovery and utilization system shown in an embodiment of the present application;

[0035] Figure 4 It is a schematic diagram of the heat exchange baffle structure of the waste heat comprehensive recovery and utilization system shown in the embodiment of the present application;

[0036] Reference numerals:

[0037] 1. Waste heat collection flue; 11. Gravity settling chamber; 12. Convection chamber; 13. First row of ash outlets; 14. First partition; 15. Second partition; 16. Second row of ash outlets; 2. Heat transfer oil waste heat recovery system; 21 Heat transfer oil station, 22 Heat transfer oil pump; 3. Lithium bromide refrigeration unit; 4. Heat exchange component; 41. Convection tube bundle; 42. Heat exchange partition; 5. Bag filter; 51. Insulated ash bin; 52 Insulation jacket; 6. Mixing cylinder; 61. Valve; 7. Soot blowing device. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0039] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The present application provides a comprehensive recovery and utilization system for waste heat from flue gas of a copper smelting anode furnace, which is mainly used for dust removal and purification and waste heat recovery of the flue gas of the copper smelting anode furnace to ensure that the discharged flue gas meets the emission standards and saves energy and reduces carbon emissions.

[0043] It includes a waste heat collection flue 1, a heat transfer oil waste heat recovery system 2, a lithium bromide refrigeration unit 3, a heat exchange component 4, a bag filter 5, and an air mixing cylinder 6; the heat transfer oil waste heat recovery system 2 includes a heat transfer oil station 21 and a heat transfer oil pump 22; an insulation ash bin 51 is provided at the bottom of the insulation ash bin 51, and an insulation jacket 52 is welded on the outer side of the steel ash bin of the insulation ash bin 51.

[0044] One end of the flue gas side of the waste heat collection flue 1 is connected to the flue gas outlet exhaust pipe of the copper smelting anode furnace, so that the flue gas of the copper smelting anode furnace is introduced into the waste heat collection flue 1. The temperature of the flue gas of the anode furnace is generally (300-600)°C. The other end of the waste heat collection flue 1 is connected to the bag filter 5 through the gas mixing cylinder 6, so that the flue gas is introduced into the bag filter 5 for purification. The main structure of the waste heat collection flue 1 is composed of lightweight insulation bricks, thermal insulation materials, steel structures, etc.

[0045] A heat exchange component 4 is arranged in the waste heat collection flue 1. The heat exchange component 4 adopts a convection tube bundle 41 or a heat exchange baffle 42. When the flue gas passes through the heat exchange component 4, heat convection heat exchange occurs with the heat exchange component 4, thereby heating the heat-conducting medium in the heat exchange component 4, so that the waste heat of the flue gas is collected by the heat exchange component 4; at the same time, after absorbing heat by the heat exchange component 4, the temperature of the flue gas discharged from the waste heat collection flue 1 is reduced to about 200°C to meet the use requirements of the bag filter 5.

[0046] The lithium bromide refrigeration unit 3 includes core components such as a generator, a condenser, an evaporator, an absorber and a solution heat exchanger. The heat transfer medium is heat transfer oil, which has the properties of resistance to thermal cracking and chemical oxidation, good heat transfer efficiency, fast heat dissipation and good thermal stability; under almost normal pressure conditions, heat transfer oil as a heat transfer medium can obtain a very high operating temperature, which can greatly reduce the operating pressure and safety requirements of the high-temperature heating system, and improve the reliability of the system and equipment; it can meet the process requirements of heating at different temperatures in a wider temperature range.

[0047] The heat exchange component 4 is equipped with an inlet header and an outlet header, the inlet header is connected to the oil inlet pipe of the heat transfer oil waste heat recovery system 2, and the outlet header is connected to the oil return pipe of the heat transfer oil waste heat recovery system 2; specifically, the heat transfer oil station 21 is connected to the inlet header of the heat exchange component 4 through a heat transfer oil pump 22 and a pipeline; the outlet header is connected to the heat transfer oil station 21 and the lithium bromide refrigeration unit 3 through an oil return pipeline; in this way, the heat exchange medium is realized in the heat exchange component 4, the lithium bromide refrigeration unit 3, the heat transfer oil station 21, the heat transfer oil pump 22, the heat exchange component 4 circulates in sequence, and then the heat collected by the heat exchange component 4 is transported to the lithium bromide refrigeration unit 3. Specifically, the evaporator of the lithium bromide refrigeration unit 3 is a component that requires heat. A heat exchange tube is arranged in the evaporator. The heat collected by the heat exchange component 4 is transported to the heat exchange tube through a heat transfer medium for the evaporator to use as a working heat source to drive the lithium bromide refrigeration unit 3, and the output supplies the cooling capacity of the plant air-conditioning system and the compression fan inlet heat exchanger, thereby reducing the power energy consumption of the traditional air-conditioning and achieving the purpose of energy saving and consumption reduction.

[0048] In this embodiment, the oil inlet end of the lithium bromide refrigeration unit 3 is connected to the oil return pipe of the thermal oil waste heat recovery system 2, and the oil outlet end is connected to the thermal oil station 21 through the oil return pipe; in addition, a bypass pipe is arranged on the oil return pipe, and the bypass pipe is connected to the oil inlet of the insulation jacket 52 of the insulation ash bin 51 at the bottom of the bag filter 5, and the oil outlet of the insulation jacket 52 is connected to the thermal oil station 21 through a pipe.

[0049] During operation, part of the hot oil derived from the lithium bromide refrigeration unit 3 is input into the insulation jacket 52 to heat the wall temperature of the insulation ash bin 51 at the bottom of the bag filter 5, effectively avoiding the technical problems of condensed acid and smoke agglomeration caused by too low temperature.

[0050] In some specific embodiments, the heat exchange assembly 4 includes a convection tube bundle 41 and a heat exchange baffle 42 with a membrane wall structure; the waste heat collection flue 1 is divided into a gravity settling chamber 11 and a convection chamber 12 in sequence along the flue gas flow direction;

[0051] The heat exchange baffle 42 is arranged at the bottom of the gravity settling chamber 11, and four groups of convection tube bundles 41 are arranged at intervals in the convection chamber 12 along the flue gas flow direction; when the flue gas enters the waste heat collection flue 1, it passes through the heat exchange baffle 42 and the convection tube bundle 41 in sequence, thereby collecting heat by heat conduction.

[0052] There are three groups of heat exchange baffles 42, which are respectively arranged at the bottom of the ash bin of the gravity settling chamber 11, the rear wall of the gravity settling chamber 11 and the top of the convection chamber 12, and the internal cavity of the gravity settling chamber 11 is divided into a "π"-shaped flue gas channel. In this way, the contact time between the flue gas and the heat exchange baffles 42 is effectively increased, which is beneficial to improving the heat recovery rate in the flue gas. At the same time, the setting of the baffles makes the flue gas collide with the baffles first when bypassing the baffles, and then form an upward airflow, which is beneficial to the deposition of dust in the flue gas, thereby achieving the effect of removing dust from the flue gas.

[0053] Preferably, in order to prevent the settled dust from being lifted up again by the introduced flue gas, the speed of the flue gas passing through the settling chamber should be lower than the secondary dust raising speed at which the dust is carried away again. Therefore, the flow rate of the flue gas in the settling chamber is selected within the range of (0.2-0.8) m / s.

[0054] In this embodiment, an explosion-proof door is designed on the top of the gravity settling chamber 11. The function of the explosion-proof door is to prevent the CO in the anode furnace flue gas from exceeding the explosion limit and exploding to cause damage to the flue.

[0055] In this embodiment, a conical first ash row port 13 is provided at the bottom of the gravity settling chamber 11. Two first ash row ports 13 are provided, which are respectively located below the ends of the flue gas channel. When the dust in the flue gas hits the partition or bypasses the partition and runs downward, part of the dust in the flue gas is separated under the action of inertia and then falls into the first ash row port 13, and is discharged from the waste heat collection flue 1 through the first ash row port 13, effectively avoiding the blockage problem caused by excessive dust deposition in the waste heat collection flue 1.

[0056] In this embodiment, a first partition 14 is provided on the top surface of the convection chamber 12, and a second partition 15 is provided on the bottom surface of the convection chamber 12. The first partition 14 and the second partition 15 are alternately arranged along the flue gas flow direction, thereby dividing the internal cavity of the convection chamber 12 into a serpentine flue gas flow channel; two adjacent convection tube bundles 41 are separated by the first partition 14 or the second partition 15.

[0057] Through the above arrangement, the path of the flue gas through the convection chamber 12 is lengthened, thereby extending the contact time between the flue gas and the convection tube bundle 41, thereby increasing the heat recovery efficiency in the flue gas; furthermore, the arrangement of the first baffle 14 and the second baffle 15 is also conducive to the deposition of dust in the flue gas in the convection chamber 12, thereby achieving the purpose of removing dust in the flue gas.

[0058] In this embodiment, a soot blowing device 7 is provided on the waste heat collection flue 1, which is arranged one-to-one corresponding to the convection tube bundle 41. The soot blowing device 7 can adopt an acetylene explosion soot blowing device. The soot blowing device is opened regularly according to the dust accumulation condition of the convection tube bundle 41. The vibration pulse and airflow generated by the explosion can blow the dust on the convection tube bundle 41 downward to increase the heat in the flue gas and the heat conduction efficiency in the convection tube bundle 41, thereby improving the heat recovery efficiency of the convection tube bundle 41.

[0059] The bottom of the convection chamber 12 is provided with a conical second dust discharge port 16 for discharging dust deposited in the convection chamber to avoid clogging of the convection chamber 12 .

[0060] In some specific embodiments, the mixing cylinder 6 is provided with an air distribution pipe, and the air distribution pipe is provided with a valve 61. When the temperature of the flue gas discharged from the waste heat collection flue 1 is too high, the opening of the valve 61 can be adjusted to introduce part of the external cold air into the mixing cylinder 6, and then mixed with the flue gas discharged from the waste heat collection flue 1 and introduced into the bag filter 5 for dust removal, so as to achieve the purpose of regulating the temperature of the flue gas introduced into the bag filter 5, and effectively ensure the stable operation of the bag filter 5. Specifically, when the inlet flue gas temperature of the bag filter 5 is ≥220°C, the valve 61 is opened, and a certain flow of cold air is introduced to mix with the high-temperature flue gas of the anode furnace to achieve flue gas cooling, ensuring that the inlet flue gas temperature of the bag filter 5 is <200°C.

[0061] Furthermore, a temperature sensor can be provided at the inlet of the bag collector 5 to detect the inlet temperature of the bag collector 5. The valve 61 adopts an electric regulating valve, and the opening of the electric valve is controlled by the temperature sensor, thereby realizing automatic control of mixed air and effectively reducing the labor intensity of the staff.

[0062] Copper smelting system refining process rotary anode furnace flue gas parameters oxidation period SO 3 =0.008%, H 2 O=14%as an example, refer to the calculation formula of flue gas acid dew point temperature: tsld=186+20lgφH 2 O+26lgφSO 3 Calculate the flue gas acid dew point temperature, where:

[0063] tsld is the flue gas acid dew point temperature °C;

[0064] φH 2 O is the volume percentage of water vapor in the flue gas;

[0065] φSO 3 It is the volume percentage of sulfur trioxide in the flue gas.

[0066] After calculation, the flue gas acid dew point temperature is about 120°C. Affected by the rotary cycle alternating production process, when the exhaust temperature is too low, it is easy to cause the heating surface at the tail of the flue and the metal wall temperature of the dust collector to be lower than the acid dew point. The acidic substances in the smoke are easy to condense on the surface of the metal heating surface to cause corrosion and ash accumulation, affecting the life of the equipment and safe and stable operation.

[0067] Therefore, the design should ensure that the temperature of the tail heating surface of the waste heat collection flue 1 and the metal wall of the ash bin of the bag filter 5 is always higher than the flue gas acid dew point temperature by more than 20°C, that is, preferably more than 140°C. This can effectively reduce the probability of low-temperature corrosion of the metal surface.

[0068] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A comprehensive recovery and utilization system for waste heat from flue gas of anode furnace in copper smelting, characterized by: It includes a waste heat collection flue (1), a heat transfer oil waste heat recovery system (2), a lithium bromide refrigeration unit (3), a heat exchange component (4), a bag filter (5), and a gas mixing cylinder (6); The thermal oil waste heat recovery system (2) comprises a thermal oil station (21) and a thermal oil pump (22); The bottom of the bag filter (5) is provided with an insulation ash bin (51), and an insulation jacket (52) is welded on the outer side of the steel ash bin of the insulation ash bin (51); One end of the flue gas side of the waste heat collection flue (1) is connected to the flue gas outlet exhaust pipe of the copper smelting anode furnace, and the other end is connected to the bag filter (5) through the gas mixing cylinder (6); The waste heat collection flue (1) is provided with a heat exchange component (4); the lithium bromide refrigeration unit (3) comprises a generator, a condenser, an evaporator, an absorber and a solution heat exchanger; The heat exchange assembly (4) is provided with an inlet header and an outlet header, the inlet header is connected to the oil inlet pipe of the heat transfer oil waste heat recovery system (2), and the outlet header is connected to the oil return pipe of the heat transfer oil waste heat recovery system (2); Specifically, the heat transfer oil station (21) is connected to the inlet header of the heat exchange component (4) through a heat transfer oil pump (22) and a pipeline; the outlet header is connected to the heat transfer oil station (21) and the lithium bromide refrigeration unit (3) through an oil return pipeline; The oil inlet end of the lithium bromide refrigeration unit (3) is connected to the oil return pipe of the heat transfer oil waste heat recovery system (2), and the oil outlet end is connected to the heat transfer oil station (21) through the oil return pipe; in addition, a bypass pipe is provided on the oil return pipe, and the bypass pipe is connected to the oil inlet of the insulation jacket (52) of the insulation ash bin (51) at the bottom of the bag filter (5), and the oil outlet of the insulation jacket (52) is connected to the heat transfer oil station (21) through a pipe.

2. A copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system according to claim 1, characterized in that: The heat exchange component (4) comprises a convection tube bundle (41) and a heat exchange baffle (42) with a membrane wall structure; The waste heat collection flue (1) is divided into a gravity settling chamber (11) and a convection chamber (12) in sequence along the flue gas flow direction; The heat exchange baffles (42) are three groups in total, which are respectively arranged at the bottom of the ash bin of the gravity settling chamber (11), the rear wall of the gravity settling chamber (11) and the top of the convection chamber (12), and divide the internal cavity of the gravity settling chamber (11) into a "π"-shaped smoke channel; Four groups of convection tube bundles (41) are arranged at intervals in the convection chamber (12) along the flue gas flow direction.

3. A copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system according to claim 2, characterized in that: A conical first ash discharge port (13) is provided at the bottom of the gravity settling chamber (11), and two first ash discharge ports (13) are provided, each of which is located below the end of the flue gas channel.

4. A copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system according to claim 2, characterized in that: A first baffle (14) is disposed on the top surface of the convection chamber (12), and a second baffle (15) is disposed on the bottom surface of the convection chamber (12), wherein the first baffle (14) and the second baffle (15) are alternately disposed along the direction of flue gas flow, thereby dividing the internal cavity of the convection chamber (12) into a serpentine flue gas flow passage; Two adjacent convection tube bundles (41) are separated by the first partition plate (14) or the second partition plate (15).

5. A copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system according to claim 4, characterized in that: The waste heat collection flue (1) is provided with a soot blowing device (7) arranged in one-to-one correspondence with the convection tube bundle (41); A conical second ash discharge port (16) is provided at the bottom of the convection chamber (12).

6. A copper smelting anode furnace flue gas waste heat comprehensive recovery and utilization system according to claim 1, characterized in that: The gas mixing cylinder (6) is provided with an air distribution pipe, and the air distribution pipe is provided with a valve (61).

Images